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Finding the Fourth Proportional to 2,102.54, 2,901.17 and 1,218.17

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Solution

The fourth proportional to 2,102.54, 2,901.17 and 1,218.17 is: 1,680.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.54 : 2,901.17 = 1,218.17 : x
  2. Step 2: Convert to fraction form
    2,102.54/2,901.17 = 1,218.17/x
  3. Step 3: Cross multiply
    2,102.54x = 2,901.17 × 1,218.17
  4. Step 4: Simplify right side
    2,102.54x = 3,534,121.71
  5. Step 5: Solve for x
    x = 3,534,121.71/2,102.54
  6. Step 6: Final answer
    x = 1,680.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.